How to find out if the kernel is 32-bit or 64-bit. - Linux

This is a discussion on How to find out if the kernel is 32-bit or 64-bit. - Linux ; Folks,
I have a system that has FC 6 installed on it. Someone else installed FC 6
on it and was supposed to install 64-bit. How do I find out if it is a
32-bit or 64-bit kernel?
Thanks.
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